Nguyen T.,Kumamoto University | Yano T.,Kumamoto University | Yokoshima S.,Kanagawa Environmental Research Center | Morihara T.,Ishikawa National College of Technology INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control | Year: 2014

The exposure-response relationships for road traffic noise annoyance in Vietnam were proposed according to over 4700 responses obtained in Hanoi, Ho Chi Minh, Da Nang, Hue and Thai Nguyen. However, the variation of the exposure-response curves found among the five cities implied that discrepancies could occur between different geographic regions like the north and the south of Vietnam. To assess the effects of acoustic and non-acoustic factors on road traffic noise annoyance in Vietnam, structural equation models were developed by linking the questionnaire items of the socio-acoustic surveys on road traffic noise annoyance conducted in the five cities. The sample sizes were 1174, 1403, 432, 592, and 633 to estimate the models for Hanoi, Ho Chi Minh, Da Nang, Hue and Thai Nguyen, respectively. The final model included three latent factors: Activity interference; sensitivity; and satisfaction with living environment. Sensitivity to noise, vibration and heat are determinants of personal sensitivity. Activity interference was measured by awakening in the sleep, rest and listening disturbance. Evaluations on quietness of living areas, preference to the living areas and comfort in the dry season are loaded in satisfaction with living environment. The model provided good model fit and indicated that sensitivity and satisfaction with living environment were the main modifiers of road traffic noise annoyance in Vietnam.
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To accumulate measurements of building vibrations, Sub Committee on Measurement and Analysis of Environmental Vibration and Goto laboratory at Hosei University have jointly carried out the measurement of building vibrations caused by conventional railway in a two-story wooden apartment house since 2003. In this period, for the purpose of replacing grade crossings with overpasses, the railway structure was shifted from ground railway to elevated railway. Since measurements were obtained between before and after making elevated railway, this paper focuses on the change in the building vibration characteristics and building vibration amplifications for ground-borne vibrations.
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Technical subcommittee on Socio-Acoustic Survey Data Archive, which was set up in the Institute of Noise Control Engineering/Japan in 2009 has managed SAS Data Archive (SASDA) since 2011. The SASDA, an archive of data mainly concerning community response to transportation noise in Japan, is constituted of datasets deposited by the committee members and the Ministry of the Environment in Japan. The number of collected data exceed 20,000 as of December 2011. We compare dose-response curves among noises from road traffic, conventional railway, Shinkansen railway, civil aircraft, and military aircraft by Self-Defense Force and/or U.S. Military Force. We use LAeq for 24 hours and Ldn as noise metrics. Community response is measured by annoyance due to major specific noise source. Although the number of data on aircraft noise is not enough, military aircraft noise indicates the severest annoyance. The second highest annoyance is civil aircraft noise and Shinkansen Railway noise, followed by conventional railway, road traffic noises. To validate the representativeness of the dose-response curves, we discuss factors affecting the difference in annoyance.
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